//https://leetcode.cn/problems/lemonade-change/

class Solution {
public:
    bool lemonadeChange(vector<int>& bills) {
        int five = 0, ten = 0;
        for (auto e : bills)
        {
            if (e == 5) five++;
            else if (e == 10)
            {
                if (five == 0)
                    return false;
                else
                    five--, ten++;
            }
            else
            {
                //贪心
                if (five && ten)
                {
                    five--;
                    ten--;
                }
                else if (five >= 3)
                {
                    five -= 3;
                }
                else
                {
                    return false;
                }
            }
        }


        return true;

    }
};